Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add jnPiyush/AgentX --skill cppgit clone --depth 1 https://github.com/jnPiyush/AgentXWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/jnpiyush/agentx/cpp)<a href="https://agentmods.dev/skills/jnpiyush/agentx/cpp"><img src="https://agentmods.dev/badge/skills/jnpiyush/agentx/cpp/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/jnpiyush/agentx/cpp"><img src="https://agentmods.dev/badge/skills/jnpiyush/agentx/cpp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00054 | $0.01631 |
| Opus 5.5 | $0.00022 | $0.00652 |
| Sonnet 5.5 | $0.00011 | $0.00326 |
| Haiku 4.5 | $0.00005 | $0.00163 |
Grade A, and why
cpp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.
C++ Development
WHEN: Writing or reviewing modern C++ for native libraries, back-end services, desktop apps, game/engine code, or high-performance systems where RAII, value semantics, and type safety matter.
When to Use This Skill
- Building modern C++ libraries and executables
- Refactoring legacy pointer-heavy C++ toward safer ownership
- Designing ABI-conscious native interfaces
- Applying templates, ranges, spans, and concurrency utilities responsibly
- Hardening performance-sensitive code without sacrificing maintainability
Decision Tree
C++ Project Decision
+-- New codebase?
| +-- General application/library? -> C++23 default
| +-- ABI-constrained or older platform? -> C++20 minimum with explicit constraints
+-- Ownership model?
| +-- Single owner? -> std::unique_ptr / value types
| +-- Shared ownership truly required? -> std::shared_ptr sparingly
+-- API design?
| +-- Read-only view? -> std::string_view / std::span<const T>
| +-- Mutable buffer view? -> std::span<T>
+-- Error handling?
| +-- Exceptions allowed? -> throw only across layers that can preserve invariants
| +-- Exceptions forbidden? -> std::expected or status/result type
+-- Polymorphism?
| +-- Runtime dispatch needed? -> small abstract interfaces
| +-- Compile-time composition? -> templates/concepts
-- Concurrency? -> std::jthread, futures, atomics only with clear ownership and cancellation rules
Prerequisites
- C++23-capable compiler such as GCC 15.2+ or Clang 22.1+
- CMake 3.30+ or another modern build system with compile-features support
- Sanitizers and static analysis available in development/CI builds
Table of Contents
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago Changed 09d3f1f0010c
- 1mo ago First seen · 201 lines · 54 tokens per session scan A 11c7cc81b0c8
cpp is a skill published in the GitHub repository jnPiyush/AgentX (16 stars, last pushed 3d ago), licensed Apache-2.0. It adds 54 tokens to every session and 1,631 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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